AirHint found the following cheapest return flights from Cologne (CGN) to Ljubljana (LJU) in July 2025 (see full year).

Return flights

06 Jul - 24 Jul	Lufthansa
18 Jul - 25 Jul	Lufthansa
08 Jul - 12 Jul	Lufthansa
08 Jul - 13 Jul	Lufthansa
04 Jul - 06 Jul	Lufthansa
19 Jul - 26 Jul	Lufthansa
31 Jul - 09 Aug	Lufthansa
21 Jul - 28 Jul	Lufthansa
11 Jul - 20 Jul	Lufthansa
11 Jul - 18 Jul	Lufthansa
03 Jul - 10 Jul	Lufthansa

Also check the deals for one-way flights from Cologne to Ljubljana in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Cologne to Ljubljana in July from $257

Return flights